Glass-tank.



u; G. suNGLuFF. -GLASS TANK.

l `APPLICTION FILD JAN.20| 1914.-

Patented Jan. l, 1918.

2 SHEETS-SHEET l.

WITNESSES H. G. SLINGLUFF.

GLASS TANK. APPLICATION FILED 1A'N.v20|I9I4.

||| IlII Il |I| INI IIII.

Patented Jan. 1.,-19181.

2 SHEETS-SHEET 2.

INVENTOR www .HARRY G. SLINGLUFP, or MOUNT VERNON, onio-7 AAssIGrNoR To PITTSBURGH PLATE SYLVANIA'.

Specication of Letters Patent.

GLASS-TANK.

Patented" aan. i, isis.

Appucation inea January ao, 1914. seran No. 813,197.

To all `whomz't mayconccrn:

Be it known that I, HARRY G. SLINGLUFF,' a citizen of the United States, residing atv Mount Vernon, in thecounty of Knox and, State of Ohio, have inventedv certain new` and useful Improvements in Glass-Tanks, of which the following is a specification.

The vinvention relates to tanks for the manufacture of window glass lin which the melting tank is in communication witha drawing tank or extension, or a series of such extensions. lt has for itsprimary objects, the. provision of an arrangement" for securing greater' uniformity of temperature in the drawing tanks,.and the provision of an arrangement to prevent surface. impurities from working into the drawing tanks, and particularly into those nearest the lheated portion of the melting tank. One embodiment of the invention is illustrated in the accompanying drawings, wherein-- Figure -1 is al horizontal section taken through a tank constructed in accordance with my invention, and Fig. 2 is a partial longitudinal section taken through the same tank.

The left hand end 3 of the tank (Fig. l) is heated from regenerators in the usual way,4 indicating the plurality of passages on each side of the furnace, whereby gases are supplied over the glass in the tank, while 5 isthe drawing end ofthe tank,v which is not heated, but which is in free communication ,withv the portion 3 as indi cated in Figs. lfand 2. Opening into the sides of the portion 5 of the melting tank are the extensions or drawing tanks 6, 7 8, etc.- These extensions or drawing tanks are in free communication with the melting tank, and in the particular embodiment of the invention illustrated, are provided with the movable covers or top stones 9, well known in the' art, and rovided with the drawing openings 10. pening from the end of the portion' are other drawing tanks 11 also provided with top stones and similar in construction tothe drawing tanks at the sides et the tank.

As the drawing progresses from the various drawing tanks, a large quantity of glass is of .course withdrawn from the portion 5 of the melting tank, thus causing a flow of glass from the heating sind 3. I have found that the impurities floating upon thev surface of the glass tend to collect along l the sides of the tank, and as the glass moves forward from the portion 3 to the portion 5 these. impurities tend to follow the sides of the tank. These impurities working along the sides of the tank are naturally carried into the drawing tanks 6' nearest the heated p0rtion-3 lof the melting tank,

and as a result the glass in these drawing tanks is of much poorer quality than thatv in the succeeding drawing tanks, such tanks acting as collectors for a'large portion of the impurities' formed in the entire tank. To overcome this difficulty 'and distribute.'

`the impurities among the various drawing tanksvI have provided vthe inwardly projecting deflecting or baffle walls l2 and 13 which project into the glassin .the melting tank asubstantial distance and tend to defiect the glass flowing from' the left hand "end ofthe tank to the right hand thereof,

toward the center vof the tank. .This movement inward carries the impurities' away. from the sides of .the tank and into the center thereof, so thatthe tanks 6 are relieved of a large proportion of the impuriyties which would otherwise collectrtherein.V

I have found that this arrangeme'nt gives glass in the tank 6 .ofsubstantially the. same quality as in the other tanks. f

Another advantage incident tothe use of the walls vl2 andl3, isfthe evening up of the temperature ofthe glass in the various drawing tanks. The tanks 6 beingnearest -to the heated portion of the tank will ordinarily receive the 4hottest glass, and if the temperature of the glass inl the 'succeeding tanks is at the proper point the glass in the .tanks 6 is of undue-uidity.. This is objectionable, as it is customary to draw the series of four cylinders on each side of the tank simultaneously,', and the manipulation of the drawing apparatus is much easier where the speed of draw, controlled by a single operator, is 41the same for all ofthe cylinders.` The provision of the walls l2 I and 13 increases the distance which the hot 'glass hasvto traverse in reaching the drawest the said heating means 1nd having their upper surfaces above the surface of the glass but spaced below the roof of the tanky whereby the glass Honing from the heated end of the tank is deflected away from openings into the said drawing tanks, said defleeting Walls being relatively short as Compared with the Width ot' the tank, so that the major portion of the Width o'f the tank at these Walls is unobstructed.

In testimony whereof l have hereunto signed my name in the presence of the two subscribed Witnesses.

HARRY Gr. SLINGLUFF. `Witnesses BAUNER M. ALLEN, THos. E. LAUGHER. 

